import sys
try:
	if len(sys.argv)!=3:
		print("参数数量不正确")
		
	else:
		first = int(sys.argv[1])
		second = int(sys.argv[2])
		print(first)
		print(second)
except ValueError:
	print("valid number")
except:
	print("出现其他异常")
else:
	print("%d + %d =%d"%((first+second),first,second))